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经两年多研究,从田间坏死的棉苗根和下胚轴分离的镰刀菌种的出现频率为42%。经鉴定约90%的镰刀菌是腐皮镰孢(Fusarium solani)或尖镰孢(Fusarium oxysporum)。分离出的其它病菌有木贼镰孢(Fusarium equiseti)、串珠镰孢(Fusarium moniliforme)和禾本科镰孢(Fusarium graminearum)。经温室致病力测定,不同的种和同一种内不同菌系对棉苗的致病性不同。少数菌系引起出苗后猝倒,而多数则引起根和下胚轴的坏死或根尖死亡。腐皮镰孢菌系比其它种的毒性高。
After more than two years of research, the frequency of Fusarium species isolated from the necrotic cotton seedling roots and hypocotyls in the field was 42%. About 90% of the Fusarium species identified are Fusarium solani or Fusarium oxysporum. Other pathogenic bacteria isolated are Fusarium equiseti, Fusarium moniliforme and Fusarium graminearum. Pathogenicity determined by the greenhouse, different species and the same within the different strains of cotton seedlings of different pathogenicity. A few bacteria caused cataplexy and most caused necrosis or apical death of roots and hypocotyls. Fusarium oxysporum is more virulent than other species.